"pangolayout not defined" in Ubuntu

[kosiakk]

I have a fresh installation of Ubuntu 14.04, with julia version 0.2.1.
I tried to reproduce those magnificent plot from Gadfly demo

using Gadfly
plot(x=rand(10), y=rand(10))

but I get an error (both when run from IPython and Julia terminal)

pangolayout not defined
 in text_extents at /home/sasha/.julia/v0.2/Compose/src/pango.jl:103
 in text_extents at /home/sasha/.julia/v0.2/Compose/src/pango.jl:120
 in render at /home/sasha/.julia/v0.2/Gadfly/src/guide.jl:451
 in render_prepared at /home/sasha/.julia/v0.2/Gadfly/src/Gadfly.jl:707
 in render at /home/sasha/.julia/v0.2/Gadfly/src/Gadfly.jl:656
 in writemime at /home/sasha/.julia/v0.2/Gadfly/src/Gadfly.jl:755
 in sprint at io.jl:434
 in display_dict at /home/sasha/.julia/v0.2/IJulia/src/execute_request.jl:27

Apparently, c-libraries themselves are installed and Julia bindings are too.
Am I doing something incorrectly?

> Pkg.status()
Required packages:
 - Cairo                         0.2.13
 - Gadfly                        0.2.9
 - IJulia                        0.1.11
 - PyPlot                        1.2.7
Additional packages:
 - BinDeps                       0.2.12
 - Blocks                        0.0.4
 - Codecs                        0.1.0
 - Color                         0.2.10
 - Compose                       0.1.29
 - DataArrays                    0.0.3
 - DataFrames                    0.4.3
 - DataStructures                0.2.14
 - Datetime                      0.1.3
 - Distance                      0.2.6
 - Distributions                 0.3.0
 - GZip                          0.2.12
 - Hexagons                      0.0.1
 - Iterators                     0.1.2
 - JSON                          0.3.5
 - Loess                         0.0.2
 - Nettle                        0.1.3
 - NumericExtensions             0.3.6
 - PyCall                        0.4.6
 - REPLCompletions               0.0.1
 - SortingAlgorithms             0.0.1
 - StatsBase                     0.3.8
 - URIParser                     0.0.2
 - ZMQ                           0.1.11

[al-Khwarizmi]

There are some lines of code missing from pango.jl (which used to be there before the last couple of changes). Replacing lines 47-58 by the following did the job for me:

# Backend used to compute text extents.
ccall((:g_type_init, "libgobject-2.0"), Void, ())
const pango_cairo_fm = ccall((:pango_cairo_font_map_new, libpangocairo),
                             Ptr{Void}, ())
const pango_cairo_ctx = ccall((:pango_font_map_create_context, libpango),
                              Ptr{Void}, (Ptr{Void},), pango_cairo_fm)


# Thin wrapper for a pango_layout object.
type PangoLayout
    layout::Ptr{Void}

    function PangoLayout()
        layout = ccall((:pango_layout_new, libpango),
                       Ptr{Void}, (Ptr{Void},), pango_cairo_ctx)
        # TODO: finalizer?

        new(layout)
    end
end


# We can get away with just one layout.
const pangolayout = PangoLayout()

[jimmyfigueroa]

Thank you al-Khwarizmi .. Indeed this solves the problem, in my case it was only a matter of adding the "const pangolayout = PangoLayout()" and that did the trick. Thank you so much. Jimmy.

[dcjones]

This should be fixed after updating. Sorry to temporarily break 0.2 support like this.

[kilianbreathnach]

Sorry to be reviving this thread but I seem to be getting this error after recently updating my setup. I am using master branch Gadfly and master branch of Compose.jl in order to run on julia v0.7 and I get the same error "pangolayout not defined" which then goes away when I add "const pangolayout = PangoLayout()" to pango.jl

[bjarthur]

you need to using Fontconfig after using Compose. but it's currently broken. see #299